Someone, somewhere, is making a banned chemical that destroys the ozone layer, scientists suspect

Emissions of a banned, ozone-depleting chemical are on the rise, a group of scientists reported, suggesting someone may be secretly manufacturing the pollutant in violation of an international accord. Emissions of CFC-11 have climbed 25 percent since 2012, despite the chemical being part of a group of ozone pollutants that were phased out under the 1987 Montreal...

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